A modified multiple-quantum-barrier structure has been applied to a 630-nm-band laser diode. The result is a laser exhibiting a maximum operating temperature of 74 degrees C and a threshold current of 49 mA. These characteristics correspond to a 22 degrees C increase in the operating temperature and over a 50% decrease in the threshold current, in comparison to an identical laser without a multiple quantum barrier. This is the first time, to the authors' knowledge, that a significant decrease in the threshold current of a laser has been directly attributed to the influence of a multiple quantum barrier.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Rennie et al. (1993) studied this question.
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